In message <firstname.lastname@example.org>,
Steved <email@example.com> wrote
>Does the trouble code display sequence using the trip odometer
>necessarily display all registered fault codes?
No. It displays a limited number of codes.
>Will a proper OBD II code reader be able to tell me more than the
The above just plugs into the OBD port. It then reports the error code 4
times. On the 5th read it also clears the engine light but you can
disconnect it before then until you fix the fault indicated by the code.
(Obviously, if you don't fix the fault the light will come on again)
If you live in the USA it appears that some independent car service
outlets may read the code for you for free. You can the look up the
reason for the reported code at
>Does anyone really know what all the things mean in
>the diagnostic sequence? While it's fun to make the gauges whirl
>around, I haven't gotten much use out of that feature.
The odometer sequence is explained at